The "Impossible Mission Force" (IMF) is a fictional secret espionage agency featured in the Mission: Impossible film series. The IMF is known for taking on high-stakes missions that often involve espionage, sabotage, and counter-terrorism. The team is typically led by a skilled operative, such as Ethan Hunt, who is tasked with completing dangerous assignments that seem impossible. The IMF agents use advanced technology, disguises, and teamwork to achieve their objectives. Each mission usually begins with a briefing that outlines the challenges ahead, often accompanied by the iconic phrase, "Your mission, should you choose to accept it." The series emphasizes themes of loyalty, betrayal, and the moral complexities of espionage.